Try it for a week.
Notice if you feel more relaxed, creative, energetic, peaceful, appreciative, focused or excited.
Extend it to a month.
Five minutes, ten, twenty or more, give your mind a rest.
Experiment with it.
Some articles to check out:
Meditation Research: From the Lab of Sara Lazar
Mindfulness and Lowered Stress Hormones From UC Davis News and Information
Center For Mind and Brain: UC Davis